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7. Three point-like charges are placed at the corners of an equilateral triangle as shown in the figure. Each side of the
triangle has a length of 30.0 cm, and the point (A) is located half way between 9₁ and 92. Find the electric potential at
point (A). Let q₁ = -3.20 µC, 92 = +3.80 µC, and q3 = -3.70 µC.
V
4
A
91.

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